Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [backflow-preventer]

28 questions
6
votes
2 answers

Water shut off valve and backflow preventer

I'm a new member here. I'm here to learn how to do DIY plumbing work.  How does my home's main water supply valve, backflow preventer, and Potter switch work?  Image 1. The Main water line enters the house.  There is a valve with the red handle. …
mschurner
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3
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1 answer

Why did my febco backflow preventer fail?

I'm working as a handyman for a non-profit, and they have an in-ground irrigation system that has been off for a while because "there was a geyser." I successfully determined that the geyser was water shooting out of the top of the backflow…
mHurley
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2
votes
1 answer

Do individual irrigation system branch pipes need backflow preventers?

I have an inground sprinkler system with 3 zones. The water line coming up from the basement is going to the valves and has a Wilkins backflow preventer on it. I am adding 2 new valves/zones for drip irrigation. According to my research, I need to…
Robusto
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2
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0 answers

Backflow prevention fixture on my sprinkler system has started leaking -- is teflon tape the appropriate fix?

The backflow valve on my irrigation system has developed a minor leak at the threads I am pointing to. It's outside and not super fast, so not super urgent, but I would like to get it fixed eventually. Looking at the assembly, I see that every other…
Sidney
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2
votes
1 answer

Do I need a backflow preventer before my yard hydrant

I have a yard hydrant installed in my front yard. It is connected directly to the water supply from the city. The yard hydrant has a drain at the bottom that allows water to drain from the hydrant when not in use to prevent freeze damage will this…
Fresh Codemonger
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2
votes
1 answer

Can I eliminate irrigation vacuum breaker after installing upstream RPZ?

I have an atmospheric vacuum breaker on the feed from my meter to my lawn irrigation system. I am going to install a water-powered backup sump pump in the basement. (This uses city water pressure to drive a secondary sump pump if the primary…
jay613
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2
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1 answer

I know there is a pressure vacuum breaker here, but what is the rest?

First, a labeled picture of the situation: There are three ends, two in the ground and one in the house. How can I figure out which way the water is flowing? There are four labeled valves (and one hose bib valve I left unlabeled). I'm guessing C…
John Freeman
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1
vote
1 answer

Can I seal a crack in a Zurn Wilkins 375 RP backflow preventer?

I noticed our backflow preventer was leaking, so I pulled out the assembly to see what the issue is and it looks like a decent-sized crack in the plastic above the relief valve. Is this something I can seal and have it hold, or will I need to buy a…
ryes31
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1
vote
2 answers

Is my irrigation system winterized properly?

I had a sprinkler specialist come over today to winterize my sprinkler system. I live in northwestern oregon (portland) and I'm trying to figure out if he properly winterized the system or if I need more to be done to ensure I don't have a freeze…
Veridian
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1
vote
1 answer

Can this water valve be replaced as a separate component?

Crack in bottom part of backflow preventer can you just replace this part or do you have to buy entire unit?? Thanks, Eileen
iameadams
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1
vote
0 answers

Reinstalling backflow preventer. Do I need glue or grease or anything else

I am going to reattach my backflow preventer today (save 125 vs calling company). Do I need to apply any plumber grease or pipe glue to the pvc portion? Here are some pics of the preventer and place to attach it.
arinte
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0
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1 answer

Why is my lawn sprinkler backflow preventer failing?

I have 14 zones which work fine except for zone 6. When it starts water starts coming out of backflow preventer. I already changed the valve parts and solenoid. Is there any thing else I can check?
Dennis LaSalle
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0
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0 answers

Can I remove this second side-by-side house trap and replace it with a check valve?

I'm trying to make room for a check valve to my house sanitary behind my main check valve and a Y connection to my storm line. Currently I have two lines side by side that join together near the foundation and they both have double u traps side by…
MonkeyBonkey
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One of multiple zones calls for heat, but all return lines get hot

We just installed new gas combi boiler (Lochinvar NKC199N), it is working but there is one issue that I don't quite understand. We have 4 zones (4 different circulation pumps, 4 thermostats), when zone 1 calls for heat the return line 1 gets hot…
ysok
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0
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1 answer

Backflow preventer spewing water

I have a lf009mq2t watts backflow preventer which starts spewing water from its center nozzle anytime any of my three irrigation lines stops running (or if I run a hose while its valve is off). I can make it stop spewing by running any water in the…
Paul Tarjan
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